A 15-meter M8 straight-plug to straight-socket extension cable that extends the 24VDC power bus between SIMATIC ET 200AL distributed I/O blocks. The gray PUR jacket identifies it as a power cable within the ET 200AL color-coding system. Both connectors are straight—ideal when M8 ports face horizontally and the cable route runs parallel to the mounting rail.

How does the ET 200AL power bus work?

ET 200AL I/O blocks receive 24VDC through the gray M8 power connector. When multiple blocks are daisy-chained, the power cable runs from the supply source (typically a SITOP PSU or a cabinet power distribution terminal) to the first block, then extension cables like 1AA0 carry power from one block to the next. Each block powers its own electronics and connected sensors from this shared bus—calculate the cumulative current draw across all blocks to ensure the supply and cable ampacity are adequate.

What is the difference between 1AA0 and 1AB0?

Both are 4-pole gray M8 power cables at 15 meters. The 1AA0 has straight connectors on both ends—best when ports face horizontally and cables run along a wireway. The 1AB0 has angled connectors on both ends—best when ports face upward or downward and cables must exit parallel to the mounting surface. The electrical and environmental ratings are identical. Choose based on the physical orientation of the M8 ports in your installation.